> Registration is merely a ministerial act by which a deed, contract, or instrument is sought to be inscribed in the records of the office of the Register of Deeds and annotated at the back of the certificate of title covering the land subject of the deed, contract, or instrument

> Section 10: “It shall be the duty of the Register of Deeds to immediately register an instrument presented for registration dealing with real and personal property which complies with all the requisites for registration.”

> Register may not validly refuse to register a deed of sale presented to him for registration

> Whether a document is valid or not is not for the Register to determine, this function belongs properly to a court of competent jurisdiction

> If the purpose of registration is merely to give notice, then the questions regarding the effect or invalidity of instruments are expected to be decided after, not before registration

> Registration must first be allowed and the validity or effect thereof litigated afterwards